Help sought on John Gasovski murder mystery

Police are still appealing for information about the execution-style killing of Sydney man John Gasovski, whose body was found dumped in Jamberoo bushland in June.

Mr Gasovski, 48, left his home in Arncliffe on June 9, telling family he was travelling to Canberra for work and would return the next day.

On June 15, Lake Illawarra police were called to Jamberoo Mountain Road, Budderoo, after a park ranger found Mr Gasovski's body.

A post-mortem examination confirmed he had sustained a gunshot wound to the head.

This week police launched a public appeal for information from people who may have travelled through Jamberoo, Sutton Forest or the Pheasants Nest area (where Mr Gasovski's grey Hyundai van was located) between June 9 and 23.

A spokesman for the State Crime Command said police had so far received "a good response" from the public, but urged anyone who may have passed through those areas between those dates to contact police with any information.

"We are continuing to ask anyone out there, particularly motorists who travelled through Jamberoo, Pheasants Nest or Sutton Forest, to contact police," the spokesman said.

Police are especially interested in hearing from motorists with in-car video systems, which may have captured some possibly useful footage.